CN111397086B - Refrigerant detection method and device for air conditioning system, air conditioner and storage medium - Google Patents

Refrigerant detection method and device for air conditioning system, air conditioner and storage medium Download PDF

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Publication number
CN111397086B
CN111397086B CN202010219898.7A CN202010219898A CN111397086B CN 111397086 B CN111397086 B CN 111397086B CN 202010219898 A CN202010219898 A CN 202010219898A CN 111397086 B CN111397086 B CN 111397086B
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pressure
conditioning system
temperature
air conditioning
refrigerant
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CN111397086A (en
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李丽霞
张园
江世恒
马海林
肖庆
陈振明
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a refrigerant detection method and device of an air conditioning system, an air conditioner and a storage medium. Wherein, the method comprises the following steps: acquiring temperature variation of a first target assembly pipeline and pressure variation of a second target assembly pipeline in an air conditioning system, wherein the temperature variation is detected by a temperature sensing device, and the pressure variation is detected by a pressure detection device; judging whether the air conditioning system has refrigerant leakage or not based on at least one of the temperature variation and the pressure variation; and if the refrigerant leakage of the air conditioning system is determined, alarming. The invention solves the technical problem that the interest of users in purchasing air conditioners is reduced due to higher cost of installing the concentration detection device of the air conditioning system in the related technology.

Description

Refrigerant detection method and device for air conditioning system, air conditioner and storage medium
Technical Field
The invention relates to the technical field of air conditioner control, in particular to a refrigerant detection method and device of an air conditioner system, an air conditioner and a storage medium.
Background
In the related art, a gas detection device is additionally arranged in the air conditioner to detect whether the air conditioner leaks refrigerants, which are ozone layer damage and greenhouse gases in the current atmosphere, so that natural refrigerants such as R290 and R32 are increasingly used in household air conditioners, the natural refrigerants are generally flammable gases, and once the natural refrigerants are used in the household air conditioners, certain influences and potential safety hazards are caused to the health and lives and properties of indoor people. Based on the consideration of safe use of air conditioners, many air conditioner enterprises install combustible gas concentration detection device additional on indoor air conditioner now, but this concentration detection device expense is higher, brings great cost pressure for air conditioner enterprise, has also increased consumer's expenditure simultaneously, can't promote on a large scale.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a refrigerant detection method and device of an air conditioning system, an air conditioner and a storage medium, and at least solves the technical problem that the interest of a user in purchasing an air conditioner is reduced due to the fact that the cost of installing a concentration detection device of the air conditioning system is high in the related technology.
According to an aspect of an embodiment of the present invention, a refrigerant detection method for an air conditioning system is provided, in which a temperature sensing device and a pressure detection device are disposed on a pipeline of the air conditioning system, and the refrigerant detection method includes: acquiring temperature variation of a first target assembly pipeline and pressure variation of a second target assembly pipeline in an air conditioning system, wherein the temperature variation is detected by the temperature sensing device, and the pressure variation is detected by the pressure detection device; judging whether the air conditioning system has refrigerant leakage or not based on at least one of the temperature variation and the pressure variation; and if the refrigerant leakage of the air conditioning system is determined, alarming.
Optionally, the temperature sensing device includes: the first temperature sensor is arranged on a heat exchange pipe of the indoor side evaporator, and the second temperature sensor is arranged on an exhaust pipe of the outdoor side compressor; the pressure detection device includes: the air conditioner comprises a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is arranged on an air suction pipe of an outdoor side compressor, and the second pressure sensor is arranged on an air exhaust pipe of the outdoor side compressor.
Optionally, the first target assembly comprises: the temperature change of a heat exchange tube of the indoor side evaporator is detected through a first temperature sensor to obtain a first temperature change amount, and the temperature change of an exhaust pipe of the outdoor side compressor is detected through a second temperature sensor to obtain a second temperature change amount; the second target assembly includes: the outdoor side compressor detects pressure change in an air suction pipe of the outdoor side compressor through a first pressure sensor to obtain first pressure variation, and detects pressure change in an exhaust pipe of the outdoor side compressor through a second pressure sensor to obtain second pressure variation.
Optionally, the step of obtaining the temperature variation of the first target component pipe and the pressure variation of the second target component pipe in the air conditioning system includes: respectively detecting a temperature value of a first target component and a pressure value of a second target component at intervals of a first time period in a first operation mode or a second operation mode to obtain a plurality of detection data; calculating the temperature change amount and the pressure change amount of every two adjacent time periods in a first time window based on the plurality of detection data, wherein the first time window comprises at least one first time period; based on the temperature variation and the pressure variation, judging whether the air conditioning system has refrigerant leakage or not comprises: and if the pressure variation of every two adjacent time periods in the first time window is smaller than or equal to a preset pressure threshold, the first temperature variation is smaller than or equal to a preset temperature threshold, and the second temperature variation is larger than or equal to a preset temperature threshold, determining that the refrigerant leakage occurs in the air conditioning system.
Optionally, after it is determined that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further includes: in a first operation mode, controlling an alarm unit in the air conditioning system to send out an alarm signal; and displaying the air conditioner state information of refrigerant leakage.
Optionally, after displaying the air conditioner state information of refrigerant leakage, the refrigerant detection method further includes: controlling the indoor and outdoor fans to start a high-wind-gear operation mode in the first operation mode; controlling the outdoor compressor to operate, and closing a second valve to make a refrigerant in the indoor evaporator return to the outdoor side, wherein the second valve is arranged on a connecting pipeline between the indoor evaporator and the outdoor capillary tube; and after the refrigerant backflow time reaches a second time period, closing the first valve and controlling the outdoor compressor to stop running, wherein the first valve is arranged on a connecting pipeline between the indoor evaporator and the outdoor four-way valve.
Optionally, after it is determined that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further includes: in a second operation mode, controlling an alarm unit in the air conditioning system to send out an alarm signal; and displaying the air conditioner state information of refrigerant leakage.
Optionally, after displaying the air conditioner state information of refrigerant leakage, the refrigerant detection method further includes: under the second operation mode, controlling the indoor and outdoor fans to start a high-wind-gear operation mode; controlling the operation of an outdoor compressor and closing a first valve to make a refrigerant in an indoor evaporator return to the outdoor side, wherein the first valve is arranged on a connecting pipeline between the indoor evaporator and an outdoor four-way valve; and after the refrigerant backflow time reaches a second time period, closing a second valve and controlling the outdoor side compressor to stop running, wherein the second valve is arranged on a connecting pipeline between the indoor side evaporator and the outdoor side capillary tube.
Optionally, the step of obtaining the temperature variation of the first target component pipe and the pressure variation of the second target component pipe in the air conditioning system includes: under a third operation mode, respectively receiving the temperature value of the exhaust pipe of the outdoor side compressor detected by the second temperature sensor and the pressure value of the exhaust pipe of the outdoor side compressor detected by the second pressure sensor at intervals of a first time period to obtain a plurality of detection data; calculating the temperature variation and the pressure variation of every two adjacent time periods in the first time window based on the plurality of detection data; based on the temperature variation and the pressure variation, judging whether the air conditioning system has refrigerant leakage or not comprises: inquiring the position of a temperature value detected by a second temperature sensor and an initial pressure value corresponding to the position of the temperature value in a preset mapping relation table, wherein the mapping relation between the temperature and the pressure is stored in the preset mapping relation table; comparing the pressure difference between the initial pressure value and the pressure value detected by the second pressure sensor; and if the pressure ratio of the pressure difference value to the initial pressure value is greater than a preset proportional threshold, determining that the refrigerant leakage occurs in the air conditioning system.
Optionally, after it is determined that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further includes: in a third operation mode, controlling an alarm unit in the air-conditioning system to send out an alarm signal; and displaying the air conditioner state information of refrigerant leakage.
Optionally, after displaying the air conditioner state information of refrigerant leakage, the refrigerant detection method further includes: in the third operating mode; controlling the indoor and outdoor fans to start a high-wind-gear running mode; controlling the air conditioning system to enter a first operation mode, controlling the outdoor compressor to operate, and closing the second valve to make the refrigerant in the indoor evaporator flow back to the outdoor side; and after the refrigerant backflow time reaches a second time period, closing the first valve and controlling the outdoor side compressor to stop running.
Optionally, the step of obtaining the temperature variation of the first target component pipe and the pressure variation of the second target component pipe in the air conditioning system includes: when the air conditioning system is in a shutdown state, respectively receiving the temperature value of the exhaust pipe of the outdoor side compressor detected by the second temperature sensor and the pressure value of the exhaust pipe of the outdoor side compressor detected by the second pressure sensor every third time slot to obtain a plurality of detection data; calculating the temperature change amount and the pressure change amount of every two adjacent time periods in a second time window based on the plurality of detection data, wherein the second time window comprises: a plurality of third time periods; based on the temperature variation and the pressure variation, judging whether the air conditioning system has refrigerant leakage or not comprises: inquiring the position of the temperature value detected by the second temperature sensor and an initial pressure value corresponding to the position of the temperature value in a preset mapping relation table; comparing the pressure difference between the initial pressure value and the pressure value detected by the second pressure sensor; and if the pressure ratio of the pressure difference value to the initial pressure value is greater than a preset proportional threshold, determining that the refrigerant leakage occurs in the air conditioning system.
Optionally, after it is determined that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further includes: when the air-conditioning system is in a shutdown state, controlling an alarm unit in the air-conditioning system to send out an alarm signal; and displaying the air conditioner state information of refrigerant leakage.
Optionally, after displaying the air conditioner state information of refrigerant leakage, the refrigerant detection method further includes: controlling the indoor and outdoor fans to start a high-wind-gear running mode when the air conditioning system is in a shutdown state; controlling the air conditioning system to enter a first operation mode, controlling the outdoor compressor to operate, and closing the second valve to make the refrigerant in the indoor evaporator flow back to the outdoor side; and after the refrigerant backflow time reaches a second time period, closing the first valve and controlling the outdoor side compressor to stop running.
According to another aspect of the embodiments of the present invention, there is also provided a refrigerant detection method for an air conditioning system, including: acquiring the temperature variation of a first target assembly pipeline and the pressure variation of a second target assembly pipeline in an air conditioning system; judging whether the air conditioning system has refrigerant leakage or not based on at least one of the temperature variation and the pressure variation; and if the refrigerant leakage of the air conditioning system is determined, alarming.
According to another aspect of the embodiments of the present invention, there is also provided an air conditioner including: the system comprises an evaporator, a first temperature sensor and a second temperature sensor, wherein the evaporator is arranged on the indoor side, and the first temperature sensor is arranged on a heat exchange pipeline of the evaporator to acquire the temperature variation in the heat exchange pipeline of the evaporator; the condenser and the four-way valve are arranged on the outdoor side, the condenser is connected with the evaporator, and the four-way valve is connected with the condenser; the compressor is arranged on the outdoor side and connected with the four-way valve, a first pressure sensor is arranged on an air suction pipeline of the compressor, a second temperature sensor and a second pressure sensor are respectively arranged on an exhaust pipeline of the compressor, the temperature variation on the exhaust pipeline of the compressor is determined through the second temperature sensor, the pressure variation in the air suction pipeline of the compressor is obtained through the first pressure sensor, and the pressure variation in the exhaust pipeline of the compressor is obtained through the second pressure sensor; judging whether the air conditioner has refrigerant leakage or not based on at least one of the temperature variation and the pressure variation; and if the refrigerant leakage of the air conditioner is determined, alarming.
According to another aspect of the embodiments of the present invention, there is provided a refrigerant detection device of an air conditioning system, in which a temperature sensing device and a pressure detection device are disposed on a pipeline of the air conditioning system, the refrigerant detection device includes: an obtaining unit, configured to obtain a temperature variation of a first target assembly pipeline and a pressure variation of a second target assembly pipeline in an air conditioning system, where the temperature variation is detected by the temperature sensing device, and the pressure variation is detected by the pressure detecting device; the judging unit is used for judging whether the refrigerant leaks from the air conditioning system or not based on at least one of the temperature variation and the pressure variation; and the alarm unit is used for giving an alarm when the refrigerant leakage of the air conditioning system is determined.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium storing a program, where the program, when executed by a processor, controls a device in which the storage medium is located to execute any one of the above-mentioned refrigerant detection methods of the air conditioning system.
According to another aspect of the embodiments of the present invention, there is also provided a processor, where the processor is configured to execute a program, where the program executes the refrigerant detection method of the air conditioning system.
In the embodiment of the invention, the temperature variation of a first target assembly pipeline and the pressure variation of a second target assembly pipeline in the air-conditioning system are firstly obtained, then whether the air-conditioning system leaks the refrigerant or not is judged based on at least one of the temperature variation and the pressure variation, and finally, when the air-conditioning system leaks the refrigerant, an alarm is given. In the embodiment, an expensive combustible gas detection device is not required to be installed, temperature and pressure detection is carried out through the cheap detection modules on the component pipelines, so that the cost of the air conditioner is reduced, the leakage condition of the refrigerant of the indoor air conditioner can be detected more accurately in time, safety accidents are reduced, and the purchase interest of a user is improved, thereby solving the technical problem that the installation cost of the concentration detection device of the air conditioning system is higher in the related technology, and the purchase interest of the user is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart illustrating an alternative refrigerant detection method for an air conditioning system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an alternative air conditioning system according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a refrigerant detection method of an alternative air conditioning system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a refrigerant detection device of an alternative air conditioning system according to an embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to the air conditioner, the pressure detection device and the temperature sensing device which are low in cost are added on the pipeline of each component of the air conditioner, under a reasonable control method, the leakage condition of the refrigerant of the indoor air conditioner is timely and accurately detected, reasonable control is carried out when the refrigerant is leaked, a combustible gas concentration detection device with high cost is replaced, the cost of the air conditioner is reduced, the leakage condition of the refrigerant of the indoor air conditioner can be timely and accurately detected, and the occurrence of safety accidents is reduced.
Meanwhile, the embodiment of the invention can determine the detection method and the processing scheme after the refrigerant leakage under different operation modes according to different operation modes of the air conditioner, and the corresponding scheme is detailed. The embodiment of the invention can reduce the development cost of the combustible refrigerant air conditioner. The present invention will be described in detail with reference to examples.
In accordance with an embodiment of the present invention, there is provided an embodiment of a refrigerant detection method for an air conditioning system, where the steps shown in the flowchart of the drawings may be executed in a computer system, such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that shown.
The embodiment of the invention provides a refrigerant detection method of an air conditioning system, which is characterized in that an air conditioning system/an air conditioner is applied, a temperature sensing device and a pressure detection device are arranged on a pipeline of the air conditioning system, and the temperature sensing device and the pressure detection device can be integrally arranged or separately arranged to respectively detect the temperature and the pressure on the pipeline so as to judge whether refrigerant leakage occurs or not.
Fig. 1 is a flowchart of an alternative refrigerant detection method of an air conditioning system according to an embodiment of the present invention, and as shown in fig. 1, the method includes the following steps:
step S102, acquiring temperature variation of a first target assembly pipeline and pressure variation of a second target assembly pipeline in the air conditioning system, wherein the temperature variation is detected by a temperature sensing device, and the pressure variation is detected by a pressure detection device;
step S104, judging whether the air conditioning system leaks the refrigerant or not based on at least one of the temperature variation and the pressure variation;
and step S106, if the refrigerant leakage of the air conditioning system is determined, alarming is carried out.
Through the steps, the temperature variation of the first target assembly pipeline and the pressure variation of the second target assembly pipeline in the air-conditioning system can be obtained firstly, then whether the air-conditioning system leaks the refrigerant or not is judged based on at least one of the temperature variation and the pressure variation, and finally, when the air-conditioning system leaks the refrigerant, an alarm is given. In the embodiment, an expensive combustible gas detection device is not required to be installed, temperature and pressure detection is carried out through the cheap detection modules on the component pipelines, so that the cost of the air conditioner is reduced, the leakage condition of the refrigerant of the indoor air conditioner can be detected more accurately in time, safety accidents are reduced, and the purchase interest of a user is improved, thereby solving the technical problem that the installation cost of the concentration detection device of the air conditioning system is higher in the related technology, and the purchase interest of the user is reduced.
The present invention will be described below with reference to the respective steps.
The embodiment of the invention can be applied to an air conditioning system or an air conditioner, and the air conditioning system is schematically illustrated below. The air conditioning system can comprise an indoor part and an outdoor part, wherein the indoor part and the outdoor part are interconnected through a ventilation pipeline, the indoor part is provided with an evaporator, a turning pipeline of the evaporator is provided with a temperature sensing device (such as a temperature sensor or a temperature sensing bag), the outdoor part is provided with a capillary tube, a condenser, a four-way valve, a compressor and a liquid storage device, one side of an air suction pipeline of the compressor is provided with a pressure detection device (such as a pressure sensor), the exhaust side of the compressor is respectively provided with another temperature sensing device and another pressure detection device, a valve can be arranged between the capillary tube and the evaporator pipeline, and another valve is arranged between the four-way valve and the evaporator.
The refrigerant detected by the embodiment of the invention is HC natural refrigerant and is combustible gas.
In an embodiment of the present invention, a temperature sensing device includes: the first temperature sensor is arranged on a heat exchange pipe of the indoor side evaporator, and the second temperature sensor is arranged on an exhaust pipe of the outdoor side compressor; the pressure detection device includes: the first pressure sensor is arranged on an air suction pipe of the outdoor side compressor, and the second pressure sensor is arranged on an air exhaust pipe of the outdoor side compressor.
The temperature of the heat exchange tube of the evaporator detected by the first temperature sensor is called evaporation temperature T1 for short, the pressure value of the suction tube of the outdoor side compressor detected by the first pressure sensor is called return air pressure P1 for short, the temperature value of the exhaust tube of the outdoor side compressor detected by the second temperature sensor is called exhaust temperature T2 for short, and the pressure value of the exhaust tube of the outdoor side detected by the second pressure sensor is called exhaust pressure P2 for short.
Alternatively, the first target assembly includes: the indoor side evaporator and the outdoor side compressor detect the temperature change of a heat exchange pipe of the indoor side evaporator through a first temperature sensor to obtain a first temperature change amount, and detect the temperature change of an exhaust pipe of the outdoor side compressor through a second temperature sensor to obtain a second temperature change amount; the second target assembly includes: and the outdoor compressor detects the pressure change in the suction pipe of the outdoor compressor through the first pressure sensor to obtain a first pressure change amount, and detects the pressure change in the exhaust pipe of the outdoor compressor through the second pressure sensor to obtain a second pressure change amount.
In an embodiment of the present invention, the step of obtaining a temperature variation of a first target component pipe and a pressure variation of a second target component pipe in an air conditioning system includes: respectively detecting a temperature value of a first target component and a pressure value of a second target component at intervals of a first time period in a first operation mode or a second operation mode to obtain a plurality of detection data; calculating the temperature change amount and the pressure change amount of every two adjacent time periods in a first time window based on a plurality of detection data, wherein the first time window comprises at least one first time period; based on temperature variation and pressure variation, judge that whether air conditioning system appears the refrigerant and reveals including: and if the pressure variation of every two adjacent time periods in the first time window is smaller than or equal to a preset pressure threshold, the first temperature variation is smaller than or equal to a preset temperature threshold, and the second temperature variation is larger than or equal to a preset temperature threshold, determining that the refrigerant leakage occurs in the air conditioning system.
The first operating mode described above may include, but is not limited to: cooling/dehumidification mode, and the second mode of operation includes, but is not limited to: and (4) heating mode. From the start, the temperature or pressure value of the pipeline at the corresponding position is detected once by the temperature sensing device and the pressure detecting device every first time period (set according to the user requirement, such as 5-15s), and then the temperature change and the pressure change of each time period within a time window (the first time window can be understood as a detection window comprising a plurality of time periods, for example, 2-3min) are calculated.
The preset pressure threshold and the preset temperature threshold are adaptively adjusted and set according to the temperature and humidity conditions of various regions, and are a pressure change reference threshold or a temperature reference change threshold, for example, if the preset temperature threshold is set to be 0, in a first time window, if the pressure change value detected by the pressure detection device at each time is lower than the preset pressure threshold, the first temperature change amount is smaller than the preset temperature threshold, and the second temperature change amount is greater than the preset temperature threshold, it can be determined that refrigerant leakage occurs at this time, and the refrigerant leakage alarm mode is entered.
In an alternative embodiment of the present invention, after it is determined that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further includes: in a first operation mode, controlling an alarm unit in the air conditioning system to send out an alarm signal; and displaying the air conditioner state information of refrigerant leakage.
Optionally, after the air conditioner state information indicating that refrigerant leakage occurs is displayed, the refrigerant detection method further includes: controlling the indoor and outdoor fans to start a high-wind-gear operation mode in a first operation mode; controlling the outdoor compressor to operate, and closing a second valve to make the refrigerant in the indoor evaporator return to the outdoor side, wherein the second valve is arranged on a connecting pipeline between the indoor evaporator and the outdoor capillary tube; and after the refrigerant backflow time reaches a second time period, closing the first valve and controlling the outdoor compressor to stop running, wherein the first valve is arranged on a connecting pipeline between the indoor evaporator and the outdoor four-way valve.
The air conditioner state information may include, but is not limited to: and the preset refrigerant leakage early warning character string/early warning symbol and the air conditioner model are used for displaying the air conditioner state information through a display panel/a preset display screen on the air conditioner.
The first valve is arranged between the four-way valve and the evaporator, the second valve is arranged between the capillary tube and the evaporator, when in refrigeration, the channel flowing into the evaporator is cut off, namely the second valve is closed, the channel of the evaporator is left to be opened, namely the first valve is kept in an opening state, and after a period of time, the first valve is closed again.
The above-mentioned alarm units include but are not limited to: buzzer, loudspeaker, voice prompt, display. For example, a buzzer continuously buzzes, while a display can display air conditioner status information. After entering the refrigerant leakage alarm mode, the indoor and outdoor fans can be controlled to start a high-wind-gear operation mode, the compressor is controlled to continue to operate without stopping, the valve F2 is closed, the refrigerant in the evaporator flows back to the outdoor side through the operation of the compressor, and after a second time period, the first valve is closed and the compressor is controlled to stop operating.
Once entering the leakage alarm mode, all other programs are automatically closed, and the alarm mode can be quitted after being electrified again; and when the power is continuously cut off and the power is on, the operation is alarmed for 3 times, the program is locked, and the program needs to be checked by professional personnel and then recovered for use. At this time, the rebooting operation is considered to have a large potential safety hazard, and the user should not operate any more.
If the calculated value does not meet the preset condition (the preset condition is the regulation for judging refrigerant leakage, namely the pressure variation of every two adjacent time periods in the first time window is less than or equal to the preset pressure threshold, the first temperature variation is less than or equal to the preset temperature threshold, and the second temperature variation is greater than or equal to the preset temperature threshold), the timing is restarted from the unsatisfied time, the duration of the first time window is detected again, and the accumulated detection time does not exceed the accumulated detection duration of refrigerant leakage.
Optionally, after it is determined that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further includes: in a second operation mode, controlling an alarm unit in the air conditioning system to send out an alarm signal; and displaying the air conditioner state information of refrigerant leakage. Optionally, after the air conditioner state information indicating that refrigerant leakage occurs is displayed, the refrigerant detection method further includes: under a second operation mode, controlling the indoor and outdoor fans to start a high-wind-gear operation mode; controlling the outdoor compressor to operate, and closing a first valve to make a refrigerant in the indoor evaporator return to the outdoor side, wherein the first valve is arranged on a connecting pipeline between the indoor evaporator and the outdoor four-way valve; and after the refrigerant backflow time reaches a second time period, closing a second valve and controlling the outdoor side compressor to stop running, wherein the second valve is arranged on a connecting pipeline between the indoor side evaporator and the outdoor side capillary tube.
In the second operation mode, the condition for judging the refrigerant leakage is the same as that in the first operation mode. However, the air conditioner control method after the refrigerant leakage is determined is different from the refrigerant leakage control method in the first operation mode. After the indoor and outdoor fans are controlled to start the high-wind-gear running mode, the first valve is closed first, the refrigerant in the evaporator flows back to the outdoor side through the running of the compressor, and when a second time period (which can be understood as the refrigerant backflow time after the refrigerant leaks) is reached, the second valve is closed, and the compressor stops running.
In an embodiment of the present invention, the step of obtaining a temperature variation of a first target component pipe and a pressure variation of a second target component pipe in an air conditioning system includes: under a third operation mode, respectively receiving the temperature value of the exhaust pipe of the outdoor side compressor detected by the second temperature sensor and the pressure value of the exhaust pipe of the outdoor side compressor detected by the second pressure sensor at intervals of a first time period to obtain a plurality of detection data; calculating the temperature variation and the pressure variation of every two adjacent time periods in the first time window based on the plurality of detection data; based on temperature variation and pressure variation, judge that whether air conditioning system appears the refrigerant and reveals including: inquiring the position of the temperature value detected by the second temperature sensor and an initial pressure value corresponding to the position of the temperature value in a preset mapping relation table, wherein the mapping relation between the temperature and the pressure is stored in the preset mapping relation table; comparing the pressure difference between the initial pressure value and the pressure value detected by the second pressure sensor; and if the pressure ratio of the pressure difference value to the initial pressure value is greater than a preset ratio threshold, determining that the refrigerant leakage occurs in the air conditioning system.
Optionally, the third operation mode may include: and (5) air supply mode of the air conditioner. And detecting temperature change and pressure change in the pipeline respectively through a second temperature sensor and a second pressure sensor in each first time period from starting. The preset mapping table may be understood as a temperature-pressure value table, where the temperature variation is located and the corresponding pressure value are searched through the preset mapping table, the pressure variation is compared with the searched pressure variation, and then the pressure difference is compared with the proportional threshold, for example, using
Figure BDA0002425711690000101
Judging whether the refrigerant leaks, wherein P2 is the secondThe pressure sensor detects the pressure variation, P is the pressure variation found through the preset mapping relation table, and the preset proportion threshold is 20%.
Optionally, after it is determined that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further includes: in a third operation mode, controlling an alarm unit in the air-conditioning system to send out an alarm signal; and displaying the air conditioner state information of refrigerant leakage.
Optionally, after the air conditioner state information indicating that refrigerant leakage occurs is displayed, the refrigerant detection method further includes: under a third operation mode, controlling the indoor and outdoor fans to start a high-wind-gear operation mode; controlling the air conditioning system to enter a first operation mode, controlling the outdoor compressor to operate, and closing the second valve to make the refrigerant in the indoor evaporator flow back to the outdoor side; and after the refrigerant backflow time reaches a second time period, closing the first valve and controlling the outdoor side compressor to stop running.
After entering the leakage alarm mode, all other programs are automatically closed, the alarm mode can be quitted if the power is on again, the power is continuously cut off and the power is on to operate and alarm for 3 times, the programs are locked, and the operation is recovered after the inspection by professional personnel. At this time, the rebooting operation is considered to have a large potential safety hazard, and the user should not operate any more.
The above embodiments describe the refrigerant detection and the control method after refrigerant leakage in three operation modes. If the sleep mode, the energy-saving mode or other modes exist, the judgment mode can carry out refrigerant leakage detection and judgment according to the current basic mode (refrigeration/dehumidification, heating or air supply mode).
And if the mode is switched in the detection period, the refrigerant leakage detection is carried out again according to the changed mode.
Meanwhile, in the embodiment of the invention, if the mode is switched after the detection period, the detection of refrigerant leakage can not be carried out after the mode is changed.
The above embodiment describes the control method when the air conditioning system is turned on, and the control method after the air conditioning system is turned off is described below.
Optionally, the step of obtaining the temperature variation of the first target component pipe and the pressure variation of the second target component pipe in the air conditioning system includes: when the air conditioning system is in a shutdown state, respectively receiving the temperature value of the exhaust pipe of the outdoor side compressor detected by the second temperature sensor and the pressure value of the exhaust pipe of the outdoor side compressor detected by the second pressure sensor every third time slot to obtain a plurality of detection data; based on a plurality of detection data, calculating the temperature variation and the pressure variation of every two adjacent time periods in a second time window, wherein the second time window comprises: a plurality of third time periods; based on temperature variation and pressure variation, judge that whether air conditioning system appears the refrigerant and reveals including: inquiring the position of the temperature value detected by the second temperature sensor and an initial pressure value corresponding to the position of the temperature value in a preset mapping relation table; comparing the pressure difference between the initial pressure value and the pressure value detected by the second pressure sensor; and if the pressure ratio of the pressure difference value to the initial pressure value is greater than a preset ratio threshold, determining that the refrigerant leakage occurs in the air conditioning system.
The third time period is set to a detection period set by the air conditioner system in the off state, for example, the third time period is set to 1 to 2 days. And detecting temperature change and pressure change by using a second temperature sensor and a second pressure sensor respectively every a third time period, searching the position of the temperature change and the corresponding pressure change quantity thereof through a preset mapping relation table, judging whether refrigerant leakage occurs or not through searching data, entering a refrigerant leakage alarm mode if the refrigerant leakage is judged, otherwise, continuously detecting and comparing every third time period, and if the air-conditioning system is detected in the running mode, detecting in the next shutdown state and starting detection at the third time period.
In the embodiment of the present invention, after it is determined that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further includes: when the air-conditioning system is in a shutdown state, controlling an alarm unit in the air-conditioning system to send out an alarm signal; and displaying the air conditioner state information of refrigerant leakage.
Optionally, after the air conditioner state information indicating that refrigerant leakage occurs is displayed, the refrigerant detection method further includes: controlling the indoor and outdoor fans to start a high-wind-gear running mode when the air conditioning system is in a shutdown state; controlling the air conditioning system to enter a first operation mode, controlling the outdoor compressor to operate, and closing the second valve to make the refrigerant in the indoor evaporator flow back to the outdoor side; and after the refrigerant backflow time reaches a second time period, closing the first valve and controlling the outdoor side compressor to stop running.
The control mode of the air conditioning system after refrigerant leakage is similar to that of the air supply mode after refrigerant leakage, a first operation mode (such as a refrigeration mode) can be started after an indoor fan and an outdoor fan are started in a high-wind-gear operation mode, the compressor is controlled to continuously operate, the second valve is closed, the refrigerant in the evaporator flows back to the outdoor side through the operation of the compressor, and the first valve is closed and the compressor is controlled to stop operating after a second time period is reached.
Once entering the leakage alarm mode, all other programs are automatically closed, the alarm mode can be quitted by electrifying again, the power-off and electrifying operation is continuously carried out for 3 times, the programs are locked, and the operation is recovered after professional maintenance personnel are required to check. At this time, the rebooting operation is considered to have a large potential safety hazard, and the user should not operate any more.
The invention is illustrated below with reference to specific examples.
According to another aspect of the embodiments of the present invention, there is also provided an air conditioner including: the evaporator is arranged on the indoor side, a first temperature sensor is arranged on a heat exchange pipeline of the evaporator, and the temperature variation in the heat exchange pipeline of the evaporator is obtained through the first temperature sensor; the condenser and the four-way valve are arranged outside the room, the condenser is connected with the evaporator, and the four-way valve is connected with the condenser; the compressor is arranged on the outdoor side and connected with the four-way valve, wherein a first pressure sensor is arranged on an air suction pipeline of the compressor, a second temperature sensor and a second pressure sensor are respectively arranged on an exhaust pipeline of the compressor, the temperature variation on the exhaust pipeline of the compressor is determined through the second temperature sensor, and the pressure variation in the air suction pipeline of the compressor and the pressure variation in the exhaust pipeline of the compressor are respectively obtained through the first pressure sensor and the second pressure sensor; judging whether the air conditioning system has refrigerant leakage or not based on at least one of the temperature variation and the pressure variation; and if the refrigerant leakage of the air conditioner is determined, alarming.
Fig. 2 is a schematic diagram of an alternative air conditioning system according to an embodiment of the present invention, as shown in fig. 2, a temperature sensor T1 (i.e., a first temperature sensor) is provided on an evaporator heat exchange pipe (elbow), a pressure sensor P1 (i.e., a first pressure sensor) is provided on a compressor suction pipe, a pressure sensor P2 (i.e., a second pressure sensor) and a temperature sensor T2 (i.e., a second temperature sensor) are provided on a compressor discharge pipe, and solenoid valves F1 and F2 are provided on large and small connection pipes, respectively.
The parameters that need to be preset in advance are as follows:
t is the refrigerant leakage detection interval time (which can be understood as the first time period) when the machine is started;
tn-refrigerant leakage detection period (understood as a first time window) at startup;
tz-refrigerant leakage accumulation detection time during startup;
th-refrigerant leakage refrigerant return time (which can be understood as the second period of time) at startup;
tc-refrigerant leakage detection period (which can be understood as the third time period) during shutdown;
t-refrigerant temperature at shutdown;
p is the refrigerant pressure corresponding to T in the shutdown state;
the refrigerant detection method and the control method after refrigerant leakage in different states and operation modes of the air conditioner will be described in detail below.
1. Normal starting operation of air conditioner
1) Cooling mode/dehumidification mode
Respectively receiving data once every T (5-15s) from the start of the air conditioner to respectively obtain a T1 (first temperature value), a T2 (second temperature value) and a P1 (first pressure)Value) and P2 (second pressure value), T1, T2, P1 and P2 were detected n times, respectively, during tn (2-3min), and Δ T1 was calculated, respectively, from the second detection1＝T12-T11，△T21＝T22-T21,△P11＝P12-P11And Δ P21＝P22-P21Until the nth calculation, Δ T1 is obtainedn-1＝T1n-T1n-1，△T2n-1＝T2n-T2n-1,△P1n-1＝P1n-P1n-1And Δ P2n-1＝P2n-P2n-1And obtaining n-1 times of delta T1 (first temperature variation), delta T2 (second temperature variation), delta 0P1 (first pressure variation) and delta 1P2 (second pressure variation) within the tn time, entering a refrigerant leakage alarm mode if delta T1, delta P1 and delta P2 obtained by each calculation are all less than or equal to 0, and delta T2 obtained by each calculation is all more than or equal to 0, if the value obtained by a certain calculation does not meet the requirements of delta T1, delta P1 and delta P2 to be less than or equal to 0, and delta T2 to be more than or equal to 0, counting again from the unsatisfied time, detecting the tn time again, and accumulating the detection time to be not more than tz.
If the air conditioner enters the refrigerant leakage alarm mode, the air conditioner completes the following actions in sequence:
a, continuously buzzing by a buzzer, and simultaneously reporting a fault code by a display;
b, starting a high-wind-gear running mode by the indoor and outdoor fans;
c, the compressor is stopped, the valve F2 is closed, the refrigerant in the evaporator flows back to the outdoor side by the operation of the compressor, and after th time, the valve F1 is closed, and the compressor stops operating.
Once entering the leakage alarm mode, all other programs are automatically closed, the alarm mode can be quitted by electrifying again, the power is continuously cut off and electrified for running and alarming for 3 times, the programs are locked, and professional personnel are required to check and then recover to use. At this time, the rebooting operation is considered to have a large potential safety hazard, and the user should not operate any more.
2) Heating mode
Consistent with the refrigeration mode, if the calculated values of delta T1, delta P1 and delta P2 are all less than or equal to 0 every time and the calculated values of delta T2 are all more than or equal to 0 every time, the refrigerant leakage alarm mode is entered, if the calculated values of one time do not meet the requirements that delta T1, delta P1 and delta P2 are less than or equal to 0 and the calculated values of delta T2 are all more than or equal to 0, the time is counted again from the unsatisfied time, the tn time is detected again, and the accumulated detection time does not exceed tz.
If the air conditioner enters the refrigerant leakage alarm mode, the air conditioner completes the following actions in sequence:
a, continuously buzzing by a buzzer, and simultaneously reporting a fault code by a display;
b, starting a high-wind-gear running mode by the indoor and outdoor fans;
c, the compressor is stopped, the valve F1 is closed, the refrigerant in the evaporator flows back to the outdoor side by the operation of the compressor, and after th time, the valve F2 is closed, and the compressor stops operating.
Once entering the leakage alarm mode, all other programs are automatically closed, the alarm mode can be quitted by electrifying again, the power-off and electrifying operation is continuously carried out for 3 times, the programs are locked, and the operation is recovered after professional personnel are required to check. At this time, the rebooting operation is considered to have a large potential safety hazard, and the user should not operate any more.
3) Blowing mode
Detecting T2 and P2 every T (5-15s) from the start of the air conditioner, searching the position of the measured value T2 and the corresponding P value in the preset T-P value table, comparing the measured value P2 with the searched P value, if yes, detecting the measured value P2
Figure BDA0002425711690000141
And judging that the refrigerant leaks, entering a refrigerant leakage alarm mode, otherwise, continuously detecting and comparing once every t time, and keeping the accumulated detection time not to exceed tz.
If the air conditioner enters the refrigerant leakage alarm mode, the air conditioner completes the following actions in sequence:
a, continuously buzzing by a buzzer, and simultaneously reporting a fault code by a display;
b, starting a high-wind-gear running mode by the indoor and outdoor fans;
c, starting a refrigeration mode, operating the compressor, closing the valve F2, enabling the refrigerant in the evaporator to flow back to the outdoor side through the operation of the compressor, closing the valve F1 after th time, and stopping the operation of the compressor.
Once entering the leakage alarm mode, all other programs are automatically closed, the alarm mode can be quitted by electrifying again, the power-off and electrifying operation is continuously carried out for 3 times, the programs are locked, and the operation is recovered after professional personnel are required to check. At this time, the rebooting operation is considered to have a large potential safety hazard, and the user should not operate any more.
In the embodiment of the invention:
1) if the sleep mode, the energy-saving mode or other modes exist, the judgment method carries out refrigerant leakage detection and judgment according to the current basic mode (refrigeration/dehumidification, heating or air supply mode).
2) And if the mode is switched in the detection period, the refrigerant leakage detection is carried out again according to the changed mode.
3) If the mode is switched after the detection period, the detection of refrigerant leakage is not carried out after the mode is changed.
2. When the air conditioner is shut down
The air conditioner detects T2 and P2 once every tc (1-2 days), searches the position of the measured value T2 and the corresponding P value in the preset T-P value table, compares the measured value P2 with the searched P value, if yes, the air conditioner detects the measured value T2 and P2 once every tc (1-2 days), and if not, the air conditioner detects the measured value P2 and the P value
Figure BDA0002425711690000142
And if the air conditioner is detected in the running mode, the interval time between the detection in the next shutdown state and the detection of starting up is tc.
If the air conditioner enters the refrigerant leakage alarm mode, the air conditioner completes the following actions in sequence:
a, continuously buzzing by a buzzer, and simultaneously reporting a fault code by a display;
b, starting a high-wind-gear running mode by the indoor and outdoor fans;
c, starting a refrigeration mode, operating the compressor, closing the valve F2, enabling the refrigerant in the evaporator to flow back to the outdoor side through the operation of the compressor, closing the valve F1 after th time, and stopping the operation of the compressor.
Once entering the leakage alarm mode, all other programs are automatically closed, the alarm mode can be quitted by electrifying again, the power-off and electrifying operation is continuously carried out for 3 times, the programs are locked, and the operation is recovered after professional personnel are required to check. At this time, the rebooting operation is considered to have a large potential safety hazard, and the user should not operate any more.
According to the embodiment, the pressure sensor and the temperature sensing device which are low in cost can be additionally arranged on the component pipelines on the indoor side and the outdoor side of the air conditioner, the leakage condition of the refrigerant of the indoor air conditioner can be timely and accurately detected through an effective control method, the refrigerant leakage control modes in different modes can be determined according to the characteristics of different operation modes, the refrigerant can be timely refluxed, safety accidents are reduced, and meanwhile personal safety can be guaranteed.
Fig. 3 is a flowchart illustrating a refrigerant detection method of an alternative air conditioning system according to an embodiment of the present invention, where as shown in fig. 3, the refrigerant detection method includes:
step S301, acquiring temperature variation of a first target assembly pipeline and pressure variation of a second target assembly pipeline in the air conditioning system;
step S303, judging whether the air conditioning system leaks the refrigerant or not based on at least one of the temperature variation and the pressure variation;
and step S305, if the refrigerant leakage of the air conditioning system is determined, alarming.
Through the steps, the temperature variation of the first target assembly pipeline and the pressure variation of the second target assembly pipeline in the air-conditioning system can be obtained firstly, then whether the air-conditioning system leaks the refrigerant or not is judged based on at least one of the temperature variation and the pressure variation, and finally, when the air-conditioning system leaks the refrigerant, an alarm is given. In the embodiment, whether the air conditioner leaks the refrigerant can be judged directly through temperature change detection and pressure change detection, the detection mode not only reduces the cost of the air conditioner, but also can timely and accurately detect the refrigerant leakage condition of the indoor air conditioner, reduce the occurrence of safety accidents and improve the purchasing interest of users, thereby solving the technical problem that the cost of installing a concentration detection device of an air conditioning system in the related technology is high and the purchasing interest of the users is reduced.
Fig. 4 is a schematic diagram of an alternative refrigerant detection device of an air conditioning system according to an embodiment of the present invention, where a temperature sensing device and a pressure detection device are disposed on a pipeline of the air conditioning system, and as shown in fig. 4, the refrigerant detection device includes: an acquisition unit 41, a judgment unit 43, an alarm unit 45, wherein,
an obtaining unit 41, configured to obtain a temperature variation of a first target component pipeline and a pressure variation of a second target component pipeline in the air conditioning system, where the temperature variation is detected by a temperature sensing device and the pressure variation is detected by a pressure detection device;
a determining unit 43, configured to determine whether refrigerant leakage occurs in the air conditioning system based on at least one of the temperature variation and the pressure variation;
and the alarm unit 45 is used for giving an alarm when the refrigerant leakage of the air conditioning system is determined.
The refrigerant detection device of the air conditioning system can acquire the temperature variation of the first target assembly pipeline and the pressure variation of the second target assembly pipeline in the air conditioning system through the acquisition unit 41, then judge whether the refrigerant leakage occurs in the air conditioning system or not through the judgment unit 43 based on at least one of the temperature variation and the pressure variation, and finally alarm when the refrigerant leakage occurs in the air conditioning system is determined through the alarm unit 45. In the embodiment, an expensive combustible gas detection device is not required to be installed, temperature and pressure detection is carried out through the cheap detection modules on the component pipelines, so that the cost of the air conditioner is reduced, the leakage condition of the refrigerant of the indoor air conditioner can be detected more accurately in time, safety accidents are reduced, and the purchase interest of a user is improved, thereby solving the technical problem that the installation cost of the concentration detection device of the air conditioning system is higher in the related technology, and the purchase interest of the user is reduced.
Optionally, the temperature sensing device includes: the first temperature sensor is arranged on a heat exchange pipe of the indoor side evaporator, and the second temperature sensor is arranged on an exhaust pipe of the outdoor side compressor; the pressure detection device includes: the air conditioner comprises a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is arranged on an air suction pipe of an outdoor side compressor, and the second pressure sensor is arranged on an air exhaust pipe of the outdoor side compressor.
Alternatively, the first target assembly includes: the temperature change of a heat exchange tube of the indoor side evaporator is detected through a first temperature sensor to obtain a first temperature change amount, and the temperature change of an exhaust pipe of the outdoor side compressor is detected through a second temperature sensor to obtain a second temperature change amount; the second target assembly includes: the outdoor side compressor detects pressure change in an air suction pipe of the outdoor side compressor through a first pressure sensor to obtain first pressure variation, and detects pressure change in an exhaust pipe of the outdoor side compressor through a second pressure sensor to obtain second pressure variation.
In an embodiment of the present invention, the obtaining unit includes: the first detection module is used for respectively detecting the temperature value of the first target component and the pressure value of the second target component at intervals of a first time period in a first operation mode or a second operation mode to obtain a plurality of detection data; the first calculation module is used for calculating the temperature variation and the pressure variation of every two adjacent time periods in a first time window based on the plurality of detection data, wherein the first time window comprises at least one first time period; the judging unit includes: the first determining module is used for determining that refrigerant leakage occurs in the air conditioning system if the pressure variation of each two adjacent time periods in the first time window is smaller than or equal to a preset pressure threshold, the first temperature variation is smaller than or equal to a preset temperature threshold, and the second temperature variation is larger than or equal to a preset temperature threshold.
Optionally, the refrigerant detection device further includes: the first control module is used for controlling an alarm unit in the air conditioning system to send out an alarm signal in a first operation mode after the refrigerant leakage of the air conditioning system is determined; the first display module is used for displaying the air conditioner state information of refrigerant leakage.
Another optional refrigerant detection device further includes: the second control module is used for controlling the indoor and outdoor fans to start a high-wind-gear operation mode in the first operation mode after the air conditioner state information with refrigerant leakage is displayed; the third control module is used for controlling the outdoor compressor to operate and closing a second valve so as to enable the refrigerant in the indoor evaporator to flow back to the outdoor side, wherein the second valve is arranged on a connecting pipeline between the indoor evaporator and the outdoor capillary tube; and the fourth control module is used for closing the first valve and controlling the outdoor compressor to stop running after the refrigerant backflow time reaches a second time period, wherein the first valve is arranged on a connecting pipeline between the indoor evaporator and the outdoor four-way valve.
In an optional embodiment of the present invention, the refrigerant detecting device further includes: the fifth control module is used for controlling an alarm unit in the air-conditioning system to send out an alarm signal in a second operation mode after the refrigerant leakage of the air-conditioning system is determined; and the second display module is used for displaying the air conditioner state information of refrigerant leakage.
Another optional refrigerant detection device further includes: the sixth control module is used for controlling the indoor and outdoor fans to start a high-wind-gear operation mode in the second operation mode after the air conditioner state information with refrigerant leakage is displayed; the seventh control module is used for controlling the outdoor compressor to operate and closing the first valve so as to enable the refrigerant in the indoor evaporator to flow back to the outdoor side, wherein the first valve is arranged on a connecting pipeline between the indoor evaporator and the outdoor four-way valve; and the eighth control module is used for closing the second valve and controlling the outdoor side compressor to stop running after the refrigerant backflow time reaches a second time period, wherein the second valve is arranged on a connecting pipeline between the indoor side evaporator and the outdoor side capillary tube.
Optionally, the obtaining unit further includes: the second detection module is used for respectively receiving the temperature value of the exhaust pipe of the outdoor side compressor detected by the second temperature sensor and the pressure value of the exhaust pipe of the outdoor side compressor detected by the second pressure sensor at intervals of a first time period in a third operation mode to obtain a plurality of detection data; the second calculation module is used for calculating the temperature variation and the pressure variation of every two adjacent time periods in the first time window based on the plurality of detection data; the judging unit further includes: the first query module is used for querying the position of the temperature value detected by the second temperature sensor and an initial pressure value corresponding to the position of the temperature value in a preset mapping relation table, wherein the mapping relation between the temperature and the pressure is stored in the preset mapping relation table; the first comparison module is used for comparing the pressure difference value between the initial pressure value and the pressure value detected by the second pressure sensor; and the second determination module is used for determining that the refrigerant leakage occurs in the air conditioning system if the pressure ratio of the pressure difference value to the initial pressure value is greater than a preset proportional threshold.
In an optional embodiment of the present invention, the refrigerant detecting device further includes: the ninth control module is used for controlling an alarm unit in the air-conditioning system to send out an alarm signal in a third operation mode after the refrigerant leakage of the air-conditioning system is determined; and the third display module is used for displaying the air conditioner state information of refrigerant leakage.
Optionally, the refrigerant detection device further includes: the tenth control module is used for controlling the indoor and outdoor fans to start a high-wind-gear operation mode in the third operation mode after the air conditioner state information with refrigerant leakage is displayed; the eleventh control module is used for controlling the air conditioning system to enter the first operation mode, controlling the outdoor compressor to operate and closing the second valve so as to enable the refrigerant in the indoor evaporator to flow back to the outdoor side; and the twelfth control module is used for closing the first valve and controlling the outdoor compressor to stop running after the refrigerant backflow time reaches a second time period.
In this embodiment of the present invention, the obtaining unit further includes: the third detection module is used for respectively receiving the temperature value of the exhaust pipe of the outdoor side compressor detected by the second temperature sensor and the pressure value of the exhaust pipe of the outdoor side compressor detected by the second pressure sensor every third time period when the air conditioning system is in a shutdown state, so as to obtain a plurality of detection data; a third calculating module, configured to calculate, based on the plurality of detection data, a temperature variation and a pressure variation for each two adjacent time periods in a second time window, where the second time window includes: a plurality of third time periods; the judging unit further includes: the second query module is used for querying the position of the temperature value detected by the second temperature sensor and the initial pressure value corresponding to the position of the temperature value in the preset mapping relation table; the second comparison module is used for comparing the pressure difference value between the initial pressure value and the pressure value detected by the second pressure sensor; and the fourth determining module is used for determining that the refrigerant leakage occurs in the air conditioning system when the pressure ratio of the pressure difference value to the initial pressure value is greater than a preset proportional threshold.
Optionally, the refrigerant detection device further includes: the thirteenth control module is used for controlling an alarm unit in the air conditioning system to send out an alarm signal when the air conditioning system is in a shutdown state after the refrigerant leakage of the air conditioning system is determined; and the fourth display module is used for displaying the air conditioner state information of refrigerant leakage.
Another optional refrigerant detection device further includes: the fourteenth control module is used for controlling the indoor and outdoor fans to start a high-wind-gear operation mode when the air conditioning system is in a shutdown state after the air conditioning state information with refrigerant leakage is displayed; the fifteenth control module is used for controlling the air conditioning system to enter the first operation mode, controlling the outdoor compressor to operate and closing the second valve so as to enable the refrigerant in the indoor evaporator to flow back to the outdoor side; and the closing module is used for closing the first valve and controlling the outdoor side compressor to stop running after the refrigerant backflow time reaches a second time period.
The refrigerant detection device of the air conditioning system may further include a processor and a memory, the acquiring unit 41, the determining unit 43, the alarm unit 45, and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions.
The processor comprises a kernel, and the kernel calls a corresponding program unit from the memory. The inner core can be set to be one or more than one, and whether the air conditioner leaks the refrigerant or not is detected by adjusting the inner core parameters.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium storing a program, where the program, when executed by a processor, controls a device in which the storage medium is located to perform any one of the above-mentioned refrigerant detection methods for an air conditioning system.
According to another aspect of the embodiments of the present invention, there is also provided a processor, where the processor is configured to execute a program, where the program executes any one of the above refrigerant detection methods for an air conditioning system when running.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (18)

1. A refrigerant detection method of an air conditioning system is characterized in that a temperature sensing device and a pressure detection device are arranged on a pipeline of the air conditioning system, and the refrigerant detection method comprises the following steps:
acquiring temperature variation of a first target assembly pipeline and pressure variation of a second target assembly pipeline in an air conditioning system, wherein the temperature variation is detected by the temperature sensing device, and the pressure variation is detected by the pressure detection device;
judging whether the air conditioning system has refrigerant leakage or not based on at least one of the temperature variation and the pressure variation;
if the refrigerant leakage of the air conditioning system is determined, alarming;
the step of obtaining the temperature variation of the first target assembly pipeline and the pressure variation of the second target assembly pipeline in the air conditioning system comprises the following steps: respectively detecting a temperature value of a first target component and a pressure value of a second target component at intervals of a first time period in a first operation mode or a second operation mode to obtain a plurality of detection data; calculating the temperature change amount and the pressure change amount of every two adjacent time periods in a first time window based on the plurality of detection data, wherein the first time window comprises at least one first time period; based on the temperature variation and the pressure variation, judging whether the air conditioning system has refrigerant leakage or not comprises: and if the pressure variation of every two adjacent time periods in the first time window is smaller than or equal to a preset pressure threshold, the first temperature variation is smaller than or equal to a preset temperature threshold, and the second temperature variation is larger than or equal to a preset temperature threshold, determining that the refrigerant leakage occurs in the air conditioning system.
2. The refrigerant detection method according to claim 1, wherein the temperature sensing device includes: the first temperature sensor is arranged on a heat exchange pipe of the indoor side evaporator, and the second temperature sensor is arranged on an exhaust pipe of the outdoor side compressor; the pressure detection device includes: the air conditioner comprises a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is arranged on an air suction pipe of an outdoor side compressor, and the second pressure sensor is arranged on an air exhaust pipe of the outdoor side compressor.
3. The refrigerant detection method as claimed in claim 2, wherein the first target assembly comprises: the temperature change of a heat exchange tube of the indoor side evaporator is detected through a first temperature sensor to obtain a first temperature change amount, and the temperature change of an exhaust pipe of the outdoor side compressor is detected through a second temperature sensor to obtain a second temperature change amount; the second target assembly includes: the outdoor side compressor detects pressure change in an air suction pipe of the outdoor side compressor through a first pressure sensor to obtain first pressure variation, and detects pressure change in an exhaust pipe of the outdoor side compressor through a second pressure sensor to obtain second pressure variation.
4. The refrigerant detection method according to claim 3, wherein after determining that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further comprises:
in a first operation mode, controlling an alarm unit in the air conditioning system to send out an alarm signal;
and displaying the air conditioner state information of refrigerant leakage.
5. The refrigerant detection method according to claim 4, further comprising, after displaying the air conditioning state information indicating the occurrence of refrigerant leakage:
controlling the indoor and outdoor fans to start a high-wind-gear operation mode in the first operation mode;
controlling the outdoor compressor to operate, and closing a second valve to make a refrigerant in the indoor evaporator return to the outdoor side, wherein the second valve is arranged on a connecting pipeline between the indoor evaporator and the outdoor capillary tube;
and after the refrigerant backflow time reaches a second time period, closing the first valve and controlling the outdoor compressor to stop running, wherein the first valve is arranged on a connecting pipeline between the indoor evaporator and the outdoor four-way valve.
6. The refrigerant detection method according to claim 1, wherein after determining that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further comprises:
in a second operation mode, controlling an alarm unit in the air conditioning system to send out an alarm signal;
and displaying the air conditioner state information of refrigerant leakage.
7. The refrigerant detection method according to claim 6, further comprising, after displaying the air conditioning state information indicating the occurrence of refrigerant leakage:
under the second operation mode, controlling the indoor and outdoor fans to start a high-wind-gear operation mode;
controlling the operation of an outdoor compressor and closing a first valve to make a refrigerant in an indoor evaporator return to the outdoor side, wherein the first valve is arranged on a connecting pipeline between the indoor evaporator and an outdoor four-way valve;
and after the refrigerant backflow time reaches a second time period, closing a second valve and controlling the outdoor side compressor to stop running, wherein the second valve is arranged on a connecting pipeline between the indoor side evaporator and the outdoor side capillary tube.
8. The refrigerant detecting method according to claim 3,
the step of obtaining the temperature variation of the first target assembly pipeline and the pressure variation of the second target assembly pipeline in the air conditioning system comprises the following steps: under a third operation mode, respectively receiving the temperature value of the exhaust pipe of the outdoor side compressor detected by the second temperature sensor and the pressure value of the exhaust pipe of the outdoor side compressor detected by the second pressure sensor at intervals of a first time period to obtain a plurality of detection data; calculating the temperature variation and the pressure variation of every two adjacent time periods in the first time window based on the plurality of detection data;
based on the temperature variation and the pressure variation, judging whether the air conditioning system has refrigerant leakage or not comprises: inquiring the position of a temperature value detected by a second temperature sensor and an initial pressure value corresponding to the position of the temperature value in a preset mapping relation table, wherein the mapping relation between the temperature and the pressure is stored in the preset mapping relation table; comparing the pressure difference between the initial pressure value and the pressure value detected by the second pressure sensor; and if the pressure ratio of the pressure difference value to the initial pressure value is greater than a preset proportional threshold, determining that the refrigerant leakage occurs in the air conditioning system.
9. The refrigerant detection method according to claim 8, wherein after determining that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further comprises:
in a third operation mode, controlling an alarm unit in the air-conditioning system to send out an alarm signal;
and displaying the air conditioner state information of refrigerant leakage.
10. The refrigerant detection method according to claim 9, wherein after determining that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further comprises:
under the third operation mode, controlling the indoor and outdoor fans to start a high-wind-gear operation mode;
controlling the air conditioning system to enter a first operation mode, controlling the outdoor compressor to operate, and closing the second valve to make the refrigerant in the indoor evaporator flow back to the outdoor side;
and after the refrigerant backflow time reaches a second time period, closing the first valve and controlling the outdoor side compressor to stop running.
11. The refrigerant detecting method according to claim 3,
the step of obtaining the temperature variation of the first target assembly pipeline and the pressure variation of the second target assembly pipeline in the air conditioning system comprises the following steps: when the air conditioning system is in a shutdown state, respectively receiving the temperature value of the exhaust pipe of the outdoor side compressor detected by the second temperature sensor and the pressure value of the exhaust pipe of the outdoor side compressor detected by the second pressure sensor every third time slot to obtain a plurality of detection data; calculating the temperature change amount and the pressure change amount of every two adjacent time periods in a second time window based on the plurality of detection data, wherein the second time window comprises: a plurality of third time periods;
based on the temperature variation and the pressure variation, judging whether the air conditioning system has refrigerant leakage or not comprises: inquiring the position of the temperature value detected by the second temperature sensor and an initial pressure value corresponding to the position of the temperature value in a preset mapping relation table; comparing the pressure difference between the initial pressure value and the pressure value detected by the second pressure sensor; and if the pressure ratio of the pressure difference value to the initial pressure value is greater than a preset proportional threshold, determining that the refrigerant leakage occurs in the air conditioning system.
12. The refrigerant detection method according to claim 11, wherein after determining that refrigerant leakage occurs in the air conditioning system, the refrigerant detection method further comprises:
when the air-conditioning system is in a shutdown state, controlling an alarm unit in the air-conditioning system to send out an alarm signal;
and displaying the air conditioner state information of refrigerant leakage.
13. The refrigerant detection method according to claim 12, further comprising, after displaying air conditioning state information indicating occurrence of refrigerant leakage:
controlling the indoor and outdoor fans to start a high-wind-gear running mode when the air conditioning system is in a shutdown state;
controlling the air conditioning system to enter a first operation mode, controlling the outdoor compressor to operate, and closing the second valve to make the refrigerant in the indoor evaporator flow back to the outdoor side;
and after the refrigerant backflow time reaches a second time period, closing the first valve and controlling the outdoor side compressor to stop running.
14. A refrigerant detection method of an air conditioning system is characterized by comprising the following steps:
acquiring the temperature variation of a first target assembly pipeline and the pressure variation of a second target assembly pipeline in an air conditioning system;
judging whether the air conditioning system has refrigerant leakage or not based on at least one of the temperature variation and the pressure variation;
if the refrigerant leakage of the air conditioning system is determined, alarming;
the step of obtaining the temperature variation of the first target assembly pipeline and the pressure variation of the second target assembly pipeline in the air conditioning system comprises the following steps: respectively detecting a temperature value of a first target component and a pressure value of a second target component at intervals of a first time period in a first operation mode or a second operation mode to obtain a plurality of detection data; calculating the temperature change amount and the pressure change amount of every two adjacent time periods in a first time window based on the plurality of detection data, wherein the first time window comprises at least one first time period; based on the temperature variation and the pressure variation, judging whether the air conditioning system has refrigerant leakage or not comprises: and if the pressure variation of every two adjacent time periods in the first time window is smaller than or equal to a preset pressure threshold, the first temperature variation is smaller than or equal to a preset temperature threshold, and the second temperature variation is larger than or equal to a preset temperature threshold, determining that the refrigerant leakage occurs in the air conditioning system.
15. An air conditioner, comprising:
the system comprises an evaporator, a first temperature sensor and a second temperature sensor, wherein the evaporator is arranged on the indoor side, and the first temperature sensor is arranged on a heat exchange pipeline of the evaporator to acquire the temperature variation in the heat exchange pipeline of the evaporator;
the condenser and the four-way valve are arranged on the outdoor side, the condenser is connected with the evaporator, and the four-way valve is connected with the condenser;
a compressor arranged at the outdoor side and connected with the four-way valve, wherein a first pressure sensor is arranged on an air suction pipeline of the compressor, a second temperature sensor and a second pressure sensor are respectively arranged on an exhaust pipeline of the compressor,
determining the temperature variation on the compressor exhaust pipeline through the second temperature sensor, and respectively acquiring the pressure variation in the compressor suction pipeline through the first pressure sensor and the pressure variation in the compressor exhaust pipeline through the second pressure sensor;
judging whether the air conditioner has refrigerant leakage or not based on at least one of the temperature variation and the pressure variation; if the refrigerant leakage of the air conditioner is determined, alarming;
the step of obtaining the temperature variation of the evaporator heat exchange pipeline, the temperature variation of the compressor exhaust pipe and the pressure variation of the compressor suction pipeline in the air conditioning system comprises the following steps: under a first operation mode or a second operation mode, respectively detecting the temperature value in the evaporator heat exchange pipeline, the temperature value of the compressor exhaust pipe and the pressure value of the compressor suction pipeline at intervals of a first time period to obtain a plurality of detection data; calculating the temperature change amount and the pressure change amount of every two adjacent time periods in a first time window based on the plurality of detection data, wherein the first time window comprises at least one first time period; based on the temperature variation and the pressure variation, judging whether the air conditioning system has refrigerant leakage or not comprises: and if the pressure variation of every two adjacent time periods in the first time window is smaller than or equal to a preset pressure threshold, the first temperature variation is smaller than or equal to a preset temperature threshold, and the second temperature variation is larger than or equal to a preset temperature threshold, determining that the refrigerant leakage occurs in the air conditioning system.
16. The utility model provides a refrigerant detection device of air conditioning system which characterized in that sets up temperature sensing device and pressure detection device on air conditioning system's pipeline, and this refrigerant detection device includes:
an obtaining unit, configured to obtain a temperature variation of a first target assembly pipeline and a pressure variation of a second target assembly pipeline in an air conditioning system, where the temperature variation is detected by the temperature sensing device, and the pressure variation is detected by the pressure detecting device;
the judging unit is used for judging whether the refrigerant leaks from the air conditioning system or not based on at least one of the temperature variation and the pressure variation;
the alarm unit is used for giving an alarm when the refrigerant leakage of the air conditioning system is determined;
the step of obtaining the temperature variation of the first target assembly pipeline and the pressure variation of the second target assembly pipeline in the air conditioning system comprises the following steps: respectively detecting a temperature value of a first target component and a pressure value of a second target component at intervals of a first time period in a first operation mode or a second operation mode to obtain a plurality of detection data; calculating the temperature change amount and the pressure change amount of every two adjacent time periods in a first time window based on the plurality of detection data, wherein the first time window comprises at least one first time period; based on the temperature variation and the pressure variation, judging whether the air conditioning system has refrigerant leakage or not comprises: and if the pressure variation of every two adjacent time periods in the first time window is smaller than or equal to a preset pressure threshold, the first temperature variation is smaller than or equal to a preset temperature threshold, and the second temperature variation is larger than or equal to a preset temperature threshold, determining that the refrigerant leakage occurs in the air conditioning system.
17. A storage medium storing a program, wherein the program, when executed by a processor, controls an apparatus in which the storage medium is located to perform the refrigerant detection method of an air conditioning system according to any one of claims 1 to 13.
18. A processor, wherein the processor is configured to execute a program, and the program executes the method for detecting the refrigerant in the air conditioning system according to any one of claims 1 to 13.
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